Metallic packing.



No. 856,103. PATENTED JUNE 4, 1907.

G, n. ROLQLINS. METALLIC PACKING.

APPLICATION FILED SEPT. 10. 1908.

WITNESSES:

INVENTOR %Ma'4%/ w emzazzz GEORGE D. ROLLINS, OF PHILADELPHIA, PENNSYLVANIA.

METALLIC PACKING.

Specification of Letters Patent.

Patented June 4, 1907.

Application filed September 10,1906. Serial No. 333,925.

To a whmn it may concern.-

Be it known that I, GEORGE D. ROLLINS, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a certain new and useful Improvement in Metallic Packing, of which the following is a specification.

My invention relates to a new and useful improvement in metallic packing for steam engines and the like, and has for its object to provide a simple and effective means for holding the two parts of a packing casing in alinement.

\Vith these ends in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

In order that those skilled in the art to which this invention appertains may under stand how to make and use the same, I will describe its construction in detail, referring by. letter to the acompanying drawin forming a part of this specification, in whicli F i 'ure 1 is an end view of a two-part casing showing my improved alining plugs applied thereto. Fig. 2, a view of one-half of the casing showing the alining plugs in two different positions. Fig. 3, a cross section of a portion of the casing showing one of the alining plugs set entirely in one section of the casing, and Fig. 4, a similar view showing the alining plugs set in both sections of the casing.

In carrying out my invention as here em' bodied, A and B represent the two sections of the casing which are secured together by the screws C shown in dotted lines in Fig. 1, but in practice these screws will not prevent the sections of the casing from a slight movement upon each other, and this slight movement is sufficient to cramp the packing rings intended to be inserted within the casing, and as it is essential that these rings should not be cramped but that the grooves D in which the rings are placed should be set and remain in perfect alinement, I provide the alining plugs E, each of which consists of a screw threaded body having a head after the manner of a cap screw, and these plugs are threaded into the casing so that the heads thereof will lie partly in each section of the casing and thus serve to prevent the movement of the sections of the casing in any direction, it being understood that the heads are bottomed in the counterbores formed for their reception. These alining plugs may be either set in the ends of the casing as shown in Figs. 1 and 2 or they may be set in the sides of the casing as shown in Figs. 2, 3 and 4, and it is also to be observed that the bodies of these alinin plugs may be either threaded partly in both sections of the casing as shown in Figs. 1 and 4 or they may be threaded entirely in one section of the casing as shown in Fig. 3, the heads thereof lapping into the other section. I have found by practice that this form of alining plug is of great advantage in the manufacture of split metallic packing, since a double strength is given to the alinement of the two sections of the casing from the fact that both the body and the head of the plug assists in such alinement. Should occasion require the plugs which are in the form of sections having their heads slotted may be threaded out of the casing.

Having thus fully described my invention, what I claim as new and useful, is

In combination with the two sections of the casing of a metallic packing, cylindrical headed screws threaded into one or both sections of the casing, the heads of said screws seated in counterbores formed in both sec tions of the casing and engaging said sections, as and for the purpose set forth.

In testimony whereof, I have hereunto affixed my signature in the presence of two subscribing witnesses.

GEORGE D. ROLLINS. 

